Appliance Running-Cost Calculator
Estimate your appliance’s annual energy use and cost. Enter its power rating, daily usage, days per year and your electricity rate.
How It Works
1. Convert watts to kW: power (W) ÷ 1000. 2. Annual kWh = kW × hours/day × days/year. 3. Annual cost = annual kWh × rate (£/kWh).
Appliance Efficiency
High-efficiency models use less power for the same task—look for EU energy labels (A+++ to D).
Standby Consumption
Many devices draw power on standby; unplug or use switched outlets to avoid “vampire” loads.
Reducing Usage
Simple habits—like air-drying dishes or washing in cold water—can cut appliance run times dramatically.
Key Values
| Entity | Attribute | Units |
|---|---|---|
| Appliance | Power | W |
| Usage | Hours per day | h |
| Usage | Days per year | d |
| Cost | Rate | £/kWh |
Frequently Asked Questions
What if my appliance rating is in kW?
Enter it as watts by multiplying kW × 1000 (e.g. 2 kW = 2000 W).
Does standby consumption count?
Yes—just use the standby wattage and daily hours to see its cost.
What rates should I use?
Use your supplier’s pence-per-kWh from your most recent bill for accuracy.
How accurate is this?
Very accurate if you use measured run-hours and exact meter rates.
